An integer is a number that can be expressed as a whole number. In technical math jargon, the integers are the natural numbers {0, 1, 2...} their negatives and the number 0.
| Integers | Not integers |
|---|---|
| 22 | $$ \frac 1 2 $$ |
| $$ 0 $$ | $$ \pi $$ |
| $$ -5 $$ | -¼ |
| $$ -1,001 $$ | $$ \frac 3 4 $$ |
| $$ \sqrt 4 $$ because we can simplify to 2 |
$$ \sqrt 2 $$ |
